Door-spring



M. 'R. DAVIS. Door-Spring.

MPEI'EHS. PHOTD-LITHOGRAPHER, WASHINGTON. D. c.

UNITED STATES P TENT OEEIcE.

x i I MONTGOMERY R, OF JACKSON, MICHIGAN.

DOOR-SPRING.

SPECIFICATION formingpart of Letters Patent No. 224,584, dated February 17,, 1880.

Application filed August 20, 1879.

To all whom it may concern Be itknown that I, lVIONTGOMERY R. DA,-

. VIs, of Jackson, in the county of J acksonand State of Michigan, have invented certain new and useful Improvements .in Door-Springs; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it pertains to make and use it,

reference being had to the accompanying drawings, which form part of this specification. My invention relates to an improvement in door-springs; and it consists in making an eye at each end of the rod, so as to catch over a screw or other fastening, and a coil in the rod near its lower end, whereby a very cheap, simple, and effective spring is formed, as will be more fully described hereinafter. Figure 1 is a side elevation of a door with lny spring attached, and Fig. 2 is an enlarged view of the spring alone.

a represents the frame of a door, and c the door, covered with some light material, or made solid in the usual manner. g

The springicl consists of a long spring rod or wire, having an eye, 6, at each end to pass over a screw, 9, or other suitable fastening. Near the lower end of this rod is formed a coil, i, which gives additional spring to the rod, and serves notonly to prevent the rod from being strained and twisted, but to close' the door from any point and hold it closed. This coil or coils are placed low down, so as to form a convenient handle for holding the spring while fastening it in place.

It will be noticed that the eyes 6 are turned at right angles to each other, so that in fastening the rod a twist or turn is given the Wire or rod, so as tocause a constant tension, which is exerted in holding the door closed. As this tension might be too great when the door is wide open, the coil or coils 'i are provided, so asto take up all the extra tension caused by opening the door, and thus prevent the rod or Wire from being broken. By thus setting the eyes at an angle to each other before the spring is attached, common heavy wire may be used for the spring instead of the usual spring-rods,

and thus the cost of the spring greatly reduced.

Having thus described my invention, I cl aim-- As a new article of manufacture, a doorspring composed of a heavyspring-wire, 01,

having an eye, a, at each end, which eyes areturned at right angles to each other, and provided with a coil, i, the whole spring being made from a single piece of wire, substantially as shown.

In testimony that I claim the foregoing I have hereunto set my hand and seal this 18th day of August, 1879.

MONTGOMERY R. DAVIS. [L. s.]

Witnesses:

WM. SEWARD GRIDLEY, GEORGE H. BLAIR. 

